Brake



M. w. McCONKEY Re. 20,001

BRAKE Original Filed Feb. 11, 1929 June 9, 1936.

IN VEN TOR.

MONTGOMERY w MComcr .M

ATTORNEY Reissued June 9, 1936 UNITED STATES PATENT. OFFICE Brake Company. South Bend. M, a corporation oi Illinois application February ll, 1928. Serial No.

339,000. Divided and application March I, 1931. Serial No. 520,802, new Patent No. 1,939,208. dated January 29, 1935. This application for reissue December 5, 1935, Serial No. 53,021

46 Claims. (Ci- Ill-79.5)

This invention relates to brakes and more partlcuiarly to internal expanding brakes.

The application on which my original Patent No. 1,989,208, oi which this is an application ior 5 reissue, was granted was a division oi application 339.000, iiled February ii, i929.

Broadly, the invention comprehends means ior adjusting the iriction elements oi an internal expanding brake to compensate ior wear on the i0 linings thereoi and to position the iriction elements in proper relation to the braking suriace oi the drum when the brake is in the oil position.

An object oi the invention is to provide an expansible connection ior the articulated ends oi iii iriction elements.

' A salient ieature oi the invention is a hall and rocket connection between the articulated ends oi the iriction elements oi an internal expanding brake enduressiassociated therewith ior changi ing the relative positions oi the iriction elements.

An important ieatureoi the invention is an adlusting member comprising two parts threaded together and provided 'with oppositely arranged sockets adaptable ior, reception oi the articu- 5 Iated ends oiirictio'n elements.

ii'etsnother ieature oi invention is an adw yis om-21m med '0 sockets. at leastone'oi a centriiusai .Btiiiaiurtherieatureoitheinventionisto provideadevioecornprising'tiroparts togethenthepartshavingoppositeiydisposed coniesiiaceaandrecessesjopeninginopposlte "directions.

'ijhe above and other objects and ieatures oi the invention including 'various details oi structure will beap'parent irom'the ioilowing description boitheillustratedmbodimmtsshownin theac companying drawing.- whlch iorm a part oi this specification. and in which:

Figure l is a v'erticalseetionsl view taken Just. back oi the head oi the druniillustratina the iriction elements in side elevation and showing the invention as applied:

Figure 2 is an enlarged detail view; and

Figure 3 is a modification oi the invention.

Reierrlngtothedrawingiormorespeciiledeg tails oi the invention. ll represents a ilxed support suehasabackingplstehsving associated therewith a rotatable drum I! which m be secured to a wheel. not shown. Positioned on the backing plate are suitable anchors l4 and I and B steady rests l8 and iii, an positioned ior movespreading the or the applied ioroe.=to cle separable ends oi the friction elements or shoes It and It is a hosting operating can I! ior shoes into engagement with the drum against the resistanceoi a return spring ll connected between the shoes and-a return spring It connecting theshoe fltoansedsupportonthe backing plate. iihese springs aerve'.=upon release ments or shoes to the oil position'apd to retain themwhenintheoiipositionin'properspacedreiation to the braking'suriace oi the j The iriction eiements-or'ahoes are-eonnect'ed element It is provided with a ball or hemispherical memberilfl and the articulated end or the iriction' element it has thereon an eztendins'portion flpsovldedwith aserni-eiroularend.

Positioned betweeirthe hemisp cal ill andthesemi-cireularmdllonthe'extension 4! is the adjusting device including a=me|nber 08 having an bearing snriace ll provided with a eircumierentislaiot ll ior the receptionoi a semi-circular end ll Ii oi the iriction element 26. line opposite end of this member is provided with a conical shoulder 52, and extending axially irom thesho'ulder is a threaded member'il. on which is positioned ior travel a cylindrical member I! provided with a conical shoulder SI arranged in oppositely disposedrelationto theconical shoulder Ilonthe member 46. l

The member it is provided with a recea ll adaptable ior the reception oi the articulated end oi the irlction element 22. Preierably the recess iilishemispheriealsothatthehemispherical member ll on the iriction'elernent it will iit smoothly therein. As shown. the shoulder II on the member Bl is provided with serrations 1. and arranged in spaced relation on the member 55 58 are recesses 64 for the reception of an adjusting wrench.

Pivoted on the backing plate Iii Is a centering lever 66 urged into position by a spring 68. This lever has a Wedge shaped end I0 engaging the conical shoulders 52 and 58. As shown, one edge of the wedge shaped end on the centering lever engages the serrations G2 on the member 56, so that the member as may be retained in adjusted position.

A modification of the invention is illustrated in Figure 3, wherein the friction elements 22 and 2| have positioned between their articulated ends an adjusting device including a threaded member I! provided with a diametral slot II for the reception of the web on the friction element I2 and a head 16 having a socket 'lladaptable for the reception of the articulated end of the friction element 24.

Positioned for travel on the threaded member 12 is a nut adapted to bear against a suitable abutment 82 on the articulated end of the shoe. or against the web of the shoe as may be desired. By turning the nut the shoes may be adjusted with respect to each other.

The head It on the member 1! has a reversa bevelled edge adapted to engage a centering lever 84. The lever has a notch Ii which receives the bevelled edge on the head, the notch being of such proportion that free movement of the triotion elements, together with the connecting device. may be had. when the friction elements are released, the centering lever cooperates with the bevelled edge on the head to centering friction elements.

Although this invention has been described in connection with certain specific embodiments, the principles involved are susceptible of numerous other applications that will readily occur to persons skilled in, the art. The invention is, therefore, to be limited only as indicated by the scope of the appended claims.

I claim:

1. A brake adjustlngdevice comprising a member having a recessedhead for movable thrust engagement with another part and having a threaded stem formed with a longitudinal slot adapted to receive a shoe web..a.nd a'member positioned for travel on the stem in thrust engagement with the end of said web.

2. A brake adjusting device comprising, in association with a brake shoe. a member having a threaded stem and a thrust suriacc on its end. and a nut having a spherical socket receiving the end of the shoe and positioned for travel on the stem and arranged in thrust engagement with said shoe.

3. An adjusting device comprising a member having a threaded stem at one end and a cylindrical thrust surface at its other end, and a member threaded on said stem for travel thereon having a spherical thrust surface at the end of the aillusting device opposite said cylindrical surface.

4. An adjusting device comprising a member having an arcuste bearing surface, a threaded stem on the member having its axis coinciding with a radius of the bearing. a recessed member positioned for travel on the stem and a brake shoe pivotally engaged by the recessed member.

5. An adjusting device comprising a member having a cylindrical bearing surface provided with a circumferential slot. a threaded stem on the member having its axis in a plane with a radius of the bearing and a member positioned for travel on the stem. in combination with a part having a web formed with a semicircular end seated in said slot.

6. An adjusting device comprising a member having an arcuate bearing surface provided with a circumferential slot, a threaded stem on the member having its axis in a plane with a radius of the bearing and a nut positioned for travel on the stem having a recess oppositely disposed to the bearing.

7. An adjusting device comprising a member 10 having an arcuate bearing provided with a circumferential slot, a conical shoulder on the member, a threaded stem on the shoulder. a recessed nut positioned for travel on the threaded stem. a bevelled shoulder on the nut oppositely disposed with relation to the shoulder on the member. said conical shoulder and bevelled shoulder adapted to engage a centering member and means for applying an adjusting wrench to the nut.

8. An adjusting device comprising a member 20 having a bearing suriace, a conical shoulder opposite the bearing surface. a threaded member on the conical shoulder. a recessed nut positioned for travel on the threaded member. a conical shoulder on the nut arranged in oppositely disposed relation to the conical shoulder on the member. said conical shoulder adapted to engage a centering member and means on the nut for applying a wrench.

9. An adjusting device comprising a threaded 30 member. a head on the threaded member having a conical portion and recess, said conical portion adapted to engage a centering means and a nut positioned for travel on the threaded member.

10. A brake adjusting device comprising. in 35 association with a brake shoe. a threaded member. a head on the member having a hemispherical recess adapted to engage said brake shoe and a nut positioned for travel on the member.

11. An adjusting device comprising a threaded 40 member having a diametral slot. a head on the member having a recess, a rever'sely bevelled edge on the head adapted for cooperation witha centering lever and a nut positioned for travel on the member. 45

12. An adjusting device comprising a threaded member having a dis-metal slot, a head on the member havlnga hemispherical recess. a reverse]: bevelled edge on the head, a nut positioned for travel on the threaded member and a centering lever having a notch adapted to cooperate with the edge of the nut.

iii. Abrahe comprisingfriction elements arranged end to end and means adjustably eonnectlng adjacent ends of the friction elements including two members threaded together, at least one of which is slotted to embrace one of the elements.

14. A brake comprising friction elements ar-. ranged and to end. an adjusting member positioned between adjacent ends including two members threadedtogetber. one of said members having a notciuior the reception of one of the friction elements and the other a hemispherical recess for the receptionoi the other iriction element.

15. A brake comprising at least two friction elements arranged and to end, an adjusting device between the adjacent ends oi the irlction elements including two members threaded together and provided with means for the reception oi the ends of the friction elements and oppositely disposed conlcal shoulders on the members adaptable for cooperation with a centering lever.

16. A brake comprising at least two friction elements arranged end to end. a hemispherical end on one of the friction elements, a rounded end on the other iriction element, an adjusting device between the hemispherical end and the rounded end including a member having an arcuate bearing provided with a circumferential slot for the reception of the rounded end, a threaded shank on the member and a nut positioned for travel on the threaded shank having a hemispherical recess tor the reception of the hemispherical end.

17. A unitary brake adjusting member having a head at one end adapted for disconnected thrust engagement with an adjacent element, and spaced portions at its other end adapted to straddle the web of a brake shoe and threaded means adjustably acting on said portions.

18. A unitary brake adjusting member having a head at one end adapted for disconnected thrust engagement with an adjacent element, and spaced portions at its other end adapted to straddle the web of a brake shoe.

19. A unitary brake adjusting element having one end biiurcated to straddle the web of a brake shoe and having a curved thrust surface at its other end.

20. A unitary brake adjusting element having one end bifurcated to straddle the web of a brake shoe and having a thrust socket at its other end.

21. A brake shoe having at one end a bifurcated thrust member straddling the web of the shoe and having its other end extending beyond the end of the shoe and formed with a socket for disconnected thrust engagement with an adjacent element.

22. A brake shoe having a web, a thrust member slidably engaging both sides of said web and having a head beyond the end 01 the shoe formed for disconnected thrust engagement with an adjacent brake element, and threaded means engaging the web and said member and operable to adjust said member along the web.

23. A brake shoe having a web, and a thrust member having a stem slidably engaging both sides of said web and having a thrust head beyond the end of the shoe, in combination with a brake part pivotally engaged by said heads.

24. A brake shoe having a web and having at its end a transverse flange with an opening opposite the end of the web, and an adjusting member passing through the opening and having a slotted stem straddling said web.

25. A brake shoe having a web and having at its end a transverse flange with an opening opposite the end of the web, an adjusting member passing through the opening and having a slotted stem straddling said web, and an adjusting member adjustably mounted on said stem and engaging said flange.

26. A brake shoe having a web and a slotted adjusting member straddling said web and provided with means adjacent the end 01' said web having an opening slidably encircling and guiding said member.

27. A pair of brake shoes having a floating connecting joint including a slotted thrust member straddling the end of one shoe and movably engaging the end ot the other shoe, and an adjusting device movably mounted on the thrust member and engaging said one shoe.

28. A pair oi brake shoes having a floating con-- necting joint movably engaging one shoe and including a slotted thrust member straddling the end of the other shoe, and an adjusting device threadedly engaging the thrust member and engaging said other shoe and operable to separate the shoes.

29. A pair oi brake shoes having between them a floating connecting joint comprising threadedlyconnected members engaging respectively difierent shoes and which are relatively adjustable to separate the shoes, said joint forming a rigid unit disconnectedly engaging the ends of the shoes, and means yieldlngly holding the shoes against the ends 01 said joint.

30. A pair oi brake shoes having between them a floating connecting joint comprising threadedlyconnected members engaging respectively diiiferent shoes and which are relatively adjustable to separate the shoe, said joint forming a rigid unit disconnectedly engaging the ends of the shoes, and

a spring tensioned between the shoes and holding the shoes against the ends 01 said joint.

31. A pair of brake shoes having between them a floating connecting joint comprising threadedlyconnected members engaging respectively dinerent shoes and which are relatively adjustable to separate the shoes, said joint having at its opposite ends sockets receiving the ends of the shoes.

82. A pair of brake shoes having between them a floating connecting joint comprising threadedlyconnected members engaging respectively diilerent shoes and which are relatively adjustable to separate the shoes, said joint having at its opposite ends sockets receiving the ends of the shoes, at least one 01 said sockets being a slot straddling the end of the web oi' the corresponding shoe.

33. A pair of brake shoes having between them a floating connecting joint comprising threadedlyconnected members engaging respectively different shoes and which are relatively adjustable to separate the shoes. said joint having at its opposite ends recesses movably embracing the ends oi the webs of the shoes.

34. A brake comprising a pair oi shoes, anchor-j age and applying means engaging the ends 0! said shoes at one side 01 the brake, and a floating rigid connecting joint comprising relatively adjustable parts engaging respectively difl'erent shoes and forming a thrust link of adjustable length having movable disconnected thrust engagement with the other ends of said shoes at the other side of the brake.

35. A brake comprising a pair oi shoes, anchorage and applying means eng in the ends oi said shoes at one side of the brake, a floating rigid connecting joint comprising relatively adjustable parts engaging respectively diii'erent shoes and forming a thrust link of adjustable length having movable disconnected thrust engagement with the other ends of said shoes at the other side oi the brake. and a spring tensioned between the shoes adjacent their said other ends and holding the shoes and said link in assembled relationship.

36. A brake comprising a pair of shoes, anchorage and applying means engaging the ends 01' said shoes at one side 01' the brake, and a floating rigid connecting joint comprising parts threaded together for adjustment along an axis extending chordwise of the brake to form a thrust link of adjustable length having movable disconnected thrust engagement with the other ends of said shoes at the other side of the brake.

37. A brake comprising a pair of shoes, anchorage and applying means engaging the ends of said shoes at one side of the brake, a floating rigid connecting joint comprising parts threaded together for adjustment along an axis extending chordwise 01' the brake to form. a thrust link of adjustable length having movable disconnected thrust engagement with the other ends 01' said shoes at the other side 0! the brake, and a spring tensioned between the shoes adjacent their said andholdingtheshoesandsaidlinkin' relationship. v

38. A floating brake adiustingdevloe ha head formed with acurved socket therein; with a' threaded steam having an gait threaded thereon, and formed with ahemispherivandvo'hichissmiportedandcari-ledbysaidemi's in movable disconnected engagement therewith.

ndm en cmd ne a serew tot the eii eetiveiength of said floating connection in a direction longitudinally of elements.

.41. A-brake irictioneiements arranged end to endmeans connecting adjacent ends at the friction elements including a threaded member in thrust-engagement withone of'the meme elem nts and provided with a slot, a part on the other frictionelement positioned for movement in the slot. anda nut positioned for travel on the threaded member enga in the said other i'rietion'element.-, a i:

42.. A brake iriotion member iormed with a web and having a threadedl iusting device which is slotted and which straddles he web of the triotion member, in combination, with a nut threaded 01188.1(! device and 611081 8 said web.

' 43; a 'brake having a men member formed 1- with ,a'web. and a thrust device lot-med with a slot'receivingsaid'webandwhichhas 1 thereona nut said web and transmitting thrust thereto;

44am abrake, the of s. shoe havaninwardiy. web. for w s the eilectivelength oi having in which. said fits, screw meansengagfor moving in a directhe shoe swlngmeans to: in the direction when'saidscrewmeansis released. q i

- 455- In apparatusoi the class-described the combination ot abiake shoe having a thin inwardly extendingv web extending a considerable distance along said shoe between its side an adjusting member en aging opposite sidesgo! said web and extendingone end oi said shoe. and screwmeans m the ad-.

iusting member and saidshoe and when turned lnadireetion lengthwise'ot theshoeto move said adiiisting to increase-the eiiective length oi saids'hoe' and when t'md in the opposite direction to allow said adjusting member to be moved to decrease the elective length of member movabiy carrled'hy the member andengaging said shoe and adapted to move said adJust-ing memberin one direction and a spring adapted to move said adjusting member in the opposite direction. I

' MONTGOMERY W.'MOCONKEY.

CERTIFICATE OF CORRECTION.

Reissue No. 20,001. June 9, 1936.

MONTGOMERY w. MCCONKEY.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 4, first column, line 6, claim 38, for the word "steam" read stem; and that the said Letters Patent should be read with this correction therein that .the same may conform to the record of the case in the Patent Office.

Signed and sealed this 15th day of December, A. D. 1936.

, Henry Van Arsdale (Seal) Acting Commissioner of Patents. 

